init commit

entry/include/ssl_utils.h

@@ -0,0 +1,50 @@
+#pragma once 
+
+#define EXTENSION_COUNT_MAX 128
+#define CIPHER_SUITE_COUNT_MAX 256
+
+struct cipher_suite
+{
+	uint16_t value;
+	const char* name;
+};
+
+struct tls_extension{
+	int value;
+	const char* name;
+};
+
+enum chello_parse_result
+{
+	CHELLO_PARSE_SUCCESS = 0,
+	CHELLO_PARSE_INVALID_FORMAT = -1,
+	CHELLO_PARSE_NOT_ENOUGH_BUFF = -2
+};
+
+struct ssl_version
+{
+	uint8_t minor;	
+	uint8_t major;
+	uint16_t ossl_format;
+	char str_format[STRING_MAX];
+};
+
+struct ssl_chello
+{
+	struct ssl_version min_version;
+	struct ssl_version max_version;
+	int cipher_suites_count;
+	int extension_count;
+	int cipher_suite_list[CIPHER_SUITE_COUNT_MAX];
+	int extension_list[EXTENSION_COUNT_MAX];
+	char sni[STRING_MAX];
+	char alpn[STRING_MAX];
+};
+
+struct ssl_version_map{
+	int value;
+	const char *name;
+};
+
+void ssl_chello_parse(struct ssl_chello* _chello, const unsigned char* buff, size_t buff_len, enum chello_parse_result* result);
+void ssl_chello_free(struct ssl_chello* chello);